Boring and drilling machine.



F. A. LONG.

BORING AND DRILLING MACHINE.

APPLICATION FILED FEB-17.1915.

1,178,656. Patented A r. 11, 1916.

3 SHEETS-SHEET 1.

THB COLUMBIA PMNOGRAPH co., WASHINGTON, i). c.

F; A. LONG.

BORING AND DRILLING MACHINE APPLICATION FILED FEB. 17. 1915.

1,178,656. Patented Apr. 11,1916.

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l I j 1 7 i 71 i I I Z GJIW F. A. LONG.

BORING AND DRILLING MACHINE.

APPLICATION FILED FEB- 17. 1915.

3 SHE HEET 3.

1,178,656. Patented 11; 1916.

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BORING AND DRILLING MACHINE.

Application filed February 17,1915.

T 0 all whom it may concern:

Be it known that I, FRANKLIN A. LONG, citizen the United States, residing at Spokane, in the county of Spokane and State of /Vashington, have invented certain new and useful Improvements in Boring and Drilling Machines, of which the following is a specification.

This invention relates to improvements in drilling or boring machines and is capable of use in any of the utilities common to such machines.

It is oneof the objects of this invention to provide a tool carrying work rod with operating mechanism of a novel character whereby relatively accelerated preliminary longitudinal advancing movement may be imparted to the rod to advance the same to the work, said mechanism serving there after to rotate the rod for the dual purpose of reducing its rate of advance into the work and rotating the tool carried thereby.

A further novel feature of said operating mechanism consists in continuing rotation in the same direction, as when working, to withdraw the rod out of the work and away therefrom at a relatively high speed accelerated rate, this feature having as one of the advantages the result of pulling the shavings or cuttings out of the work by means of the working tool.

A further novel feature, of the invention consists in the provision of automatically acting means for arresting the mechanism at a predetermined time during withdrawal movement of the rod so as to prevent accidental injury to the mechanism in case the latter were operated unduly. in withdrawing the rod.

Other features and objects'of the invention will he more fully described in connection with the accompanying drawings, and will be more particularly pointed out in and by the appended claims.

In the drawings: Figure 1 is a view in side elevation of a portion of the machine embodying one form of my invention, Fig. 2 is a similar view of the complete machine showing parts thereof in section, Fig. 3 is a sectional view on line 33 of Fig. 2, Fig. 4: is a sectional view on line L-t of Fig 2, Fig. 5 is a sectional view on line 5-5 of Fig. 2.

Like characters of reference designate similar parts throughout the different figures of the drawings.

Specification of Letters Patent.

Patented Apr. 11, 1915.

Serial No. 8,785.

As illustrated, my improved machine includes a substantially rectangular frame comprising normally horizontal portions 1, 2 and 3, joined by vertical portions 4:, 5 and 6. Work rod bearings 7, 8 and 9 are provided on the frame and are shown suitably sleeved, as at 10, 11 and 12, for free longitudinal or rotary movement therethrough of a threaded work rod 13. The work rod 1.3 is adapted to carry upon one end a suitable form of working tool, not shown, and dependent in character upon the work to be performed. As will be seen by reference to Fig. 2, the work rod 13 is provided with a longitudinally disposed groove or key way 14.

Mounted upon hearing 7 is a gear sleeve 15 which freely surrounds the work rod but which is provided with a key 16 engaging the key way 14 to rotate the work rod as the latter advances longitudinally through said gear sleeve 15. However, mere rotation of the gear sleeve 15 will merely rotate the rod 13 without imparting longitudinal movement thereto in either direction. Gear sleeve 15 is provided with a miter gear 17 which mesheswith a corresponding gear 18, which may be termed a driving gearu Driving gear 18 is provided with a hub 19 which is journaled in a bearing 20 and is provided with clutch portions 21 on that end thereof opposite gear 18. It will be seen by reference to Fig. 2 that this driving gear and hub is held l0ngitudinallyimmovable in the bearing 20 and therefore the gear 18 not only serves to drive gear 17 but also to hold the latter in position against bearing 7. A main or drive shaft 22 is journaled in bearing 23 and also in hub 19 and is provided with a fixed collar 24: which holds the main shaft 22 against longitudinal movement to the right of Fig. 2. A gear wheel 25 is mounted on the main drive shaft 22 to hold the latter against longitudinal movement to the left of Fig. 2. Driving rotation may be imparted to shaft 22 through a sprocket wheel 26, fixed on said shaft.

Means is provided for clutching the drive Y gear 18 with and from shaft 22 and I have shown a clutch 27 keyed to shaft 22 by key 28 so that when the clutch 27 is shifted to the left in Fig. 2, its clutch portions 29 will mesh with clutch portions 21 and drive gear 18. A split collar 30 embraces an annular groove in clutch 27 and is connected by pins 31 with the forked ends 32 of a shifting lever 33. Said shifting lever 33 is pivoted at 34 to the frame member 3 and is movable between stop limits 35 and 36.

Journaled in bearings 37 and 38 is an auxiliary shaft 39 which is provided with a gear wheel 40. Gear wheel 40 is reduced in gear 41.

speed at which auxiliary shaft 39 is driven,

size with respect to gear wheel 25, with which it meshes, and therefore auxiliary shaft 39 will be driven at a relatively higher rate of speed than drive shaft 22 dependent upon the particular ratio of gearing, which latter is not important to my invention as it is a matter of selection. Auxiliary shaft 39 carries a miter gear 41 on its remaining end.

A nut sleeve 42 has threaded engagement with work rod 13 but does not engage the key way thereof so that when sleeve 42 is rotated in either direction it will merely impart longitudinal movement to rod 13 and not rotary movement thereto. Nut sleeve 42 engages at its lower end bearing 8, and at its upper end it engages bearing 9 so as to be held against longitudinal movement. ()ppositely disposed and longitudinally extending key ways 43 are formed along the exterior of sleeve nut 42 for engagement therein of keys 44 which function to nonrotatively connect with said sleeve nut a reversing gear carrier or sleeve 45. Thus sleeve 45 is longitudinally ,movable along sleeve nut 42 but is incapable of independent rotation with respect thereto. Reversing sleeve 45 is annularly grooved to receive a split collar 46 which is connected by pins 47 with the forked ends 48 of a shifting lever 49. Shifting lever 49 is pivoted at 50 to frame member 4 and is movable into rod advancing positions, withdrawal positions and neutral positions, as indicated at points 51, 52 and 53, respectively. Shifting sleeve 45 is provided with miter gears 54 and 55 either of which may be thrown into mesh with auxiliary or rod advancing gear 41. Automatic means is provided for throwing said sleeve 45 into a neutral position should the rod 13 be withdrawn beyond a predetermined extent thereby avoiding thread stripping or other injury. As shown, said means comprises a. connecting angularly shaped element 56 having one angular arm 57 slidable in a guide 58 with its terminal 59 connected with lever 49. The remaining arm 60 overhangs rod 13 so as to be engaged and actuated thereby when said rod is withdrawn to a predetermined extent, the result being that lever 49 will be operated to shift sleeve 45 into a neutral position.

Assuming that it is desired to advance rod 13, with its tool, toward the work, clutch 27 will be thrown out, as shown in Fig. 2, and gear 54 will be shifted into mesh with Because of the relatively high sleeve nut 42 will advance rod 13 at a relathe work and also positively rotates the tool 1 so as to provide for drilling or boring movement of the latter. During such working operation of the tool, nut sleeve 42 is continuously driven and gear 15 is likewise driven, the former advancing the work rod and the latter rotating it.

After the drilling or boring operation has been completed and it is desired to withdraw the tool from the work, clutch 27 is left in engagement with gear 18 but lever 49 is reversed to throw gear 55 into mesh with gear 41, thereby reversing the direction of rotation of nut sleeve 42 from an advancing rotation to a withdrawing rotation. Because of the fact that this reversal has taken place, during rotation of rod 13 in the same direction as when the tool was in operation, by leaving 27 in a clutched position, it will now be seen that work rod 13 will be withdrawn from the work at a greatly accelerated speed but will be rotated in the same direction. Thus the tool will function to withdraw the borings or shavings from the finished bore as it is withdrawn therefrom. After the work rod has been withdrawn to a predetermined position, it will engage arm 60 and cause lever 49 to be shifted into a neutral position thereby arresting further axial upward movement of rod 13.

It is believed that the utility and advantages of my invention will be fully understood from the foregoing description, and while I have herein shown and described one specific form of my invention, I do not wish to be limited thereto except for such limitations as the claims may import.

I claim:

1. In adrilling or boring machine, a threaded work rod having a key-way, means in threaded engagement with said rod for imparting a relatively accelerated longitudinal movement thereto to advance the same to the work, and mechanism engaging the keyway of said rod for imparting movement to said rod after it has reached the work to reduce the speed rate of working advance un der load and rotate the tool carried by said rod, substantially as described.

2. In a drilling or boring machine, a threaded work rod having a key-way, means in threaded engagement with said rod for imparting a relatively accelerated longitudinal non-rotary movement thereto to advance the rod to the work and continuing to impart advanced thrust after the rod reaches the work, and mechanism engaging the keyway of said rod for imparting rotation to said rod after it reaches the work to reduce the speed rate of working advance under load and rotate the tool carried by said rod, substantially as described.

3. In a drilling or boring machine, a threaded work rod having a key-way means having threaded engagement with said rod to impart longitudinal non-rotary and relatively accelerated advancing movement thereof toward the work and continuing to impart worln'ng advance thrust after the rod reaches the work, and mechanism engaging said key-way for imparting rotation to said rod after it reaches the work to reduce the speed rate of working advance under load and rotate the tool carried by said rod, substantially as described.

4. In a drilling or boring machine, a threaded work rod having a key-way, means rotatable in one direction and having threaded engagement with said rod for imparting a relatively accelerated longitudinal advancing movement thereof to the work without rotating said, rod and continuing such advancing movement after the work has been reached, and mechanism engaging said key-way for rotating the rod during its feed advance into the work in a direction corresponding to the direction of rotation of said means to reduce the speed rate of working advance of the rod and rotate the tool carried thereby, substantially as described.

5. In a drilling or boring machine, a threaded work rod having a key-way, means having threaded engagement with said rod and rotatable in either of two directions to impart a relatively accelerated advance to the work or a relatively accelerated withdrawal movement from the work, and mechanism engaging said key-way for rotating the rod in a direction corresponding to the direction of rotation of said means when it advances the rod toward the work in order to reduce working advance of the rod, said mechanism serving to continue rotation of the rod in the same direction when said means is reversed thereby eifecting accelerslidably keyed with said rod for rotating the same in a direction corresponding to the direction of advance rotation of said sleeve nut to reduce the rate of working advance of the rod after it reaches the work and continuing such rotation in the same direction after the sleeve nut has been rotated in a reverse direction to thereby accelerate the rate of withdrawal movement of the rod out of and away from the work, substantially as described.

7 In a drilling or boring machine, a threaded work rod having a longitudinal key way, a nut sleevehaving threaded en-' gagement with said rod and being held against longitudinal movement, a reversing sleeve keyed to said nut sleeve and carrying reversing gears, 'an auxiliary shaft having an auxiliary gear for mesh engagement with either of said reversinggears, a main drive shaft having an increasing gear drive connection with said auxiliary shaft to rotate the latter at a higher rate of speed than the former, and means adapted to be connected in driven relation with said drive shaft for rotating said work rod by engagement with its key way for coaction with said sleeve nut to control and vary the rate of advancing and withdrawing longitudinal movement of said work rod, substantially as described.

In testimony whereof I aflix my signature in presence of two witnesses. I

. FRANKLIN A. LONG. Witnesses:

H. E. SMITH, EDNA BROYLES.

copies of this patent may be obtained for five cents each, by addressing the Commissioner or ratentfl, Washington, I). G. 

